MCQOPTIONS
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MCQOPTIONS
This section includes 45 Mcqs, each offering curated multiple-choice questions to sharpen your Computer Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A container originally contains 10 litres of pure spirit. From this container 1 litre of spirit is replaced with 1 litre of water. Subsequently, 1 litre of the mixture is again replaced with 1 litre of'water and this process is repeated one more time. How much spirit is now left in the container? |
| A. | 7.58 litres |
| B. | 7.84 litres |
| C. | 7 litres |
| D. | 7.29 litres |
| Answer» E. | |
| 2. |
A transporter receives the same number of orders each day. Currently, he has some pending orders (backlog) to be shipped. If he uses 7 trucks, then at the end of the 4th day he can clear all the orders. Alternatively, if he uses only 3 trucks, then all the orders are cleared at the end of the 10th day. What is the minimum number of trucks required so that there will be no pending order at the end of the 5th day? |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» D. 7 | |
| 3. |
The variable cost (V) of manufacturing a product varies according to the equation V = 4q, where q is the quantity produced. The fixed cost (F) of production of same product reduces with q according to the equation F = 100/q.How many units should be produced to minimize the total cost (V+F)? |
| A. | 5 |
| B. | 4 |
| C. | 7 |
| D. | 6 |
| Answer» B. 4 | |
| 4. |
Few school curricula include a unit on how to deal with bereavement and grief, and yet all students at some point in their lives suffer from losses through death and parting. Based on the above passage which topic would not be included in a unit on bereavement? |
| A. | how to write a letter of condolence |
| B. | what emotional stages are passed through in the healing process |
| C. | what the leading causes of death are |
| D. | Show to give support to a grieving friend |
| Answer» D. Show to give support to a grieving friend | |
| 5. |
Choose the word from the options given below that is most nearly opposite in meaning to the given word: Amalgamate |
| A. | merge |
| B. | split |
| C. | collect |
| D. | separate |
| Answer» C. collect | |
| 6. |
If you are trying to make a strong impression on your audience, you cannot do so by being understated, tentative or_____________. |
| A. | Hyperbolic |
| B. | Restrained |
| C. | Argumentative |
| D. | Indifferent |
| Answer» C. Argumentative | |
| 7. |
Choose the most appropriate word (s) from the options given below to complete the following sentence. I Contemplated ____________ Singapore for my vacation but decided against it. |
| A. | to visit |
| B. | having to visit |
| C. | visiting |
| D. | for a visit |
| Answer» D. for a visit | |
| 8. |
If Log(P) = (1/2)Log(Q) = (1/3)Log(R), then which of the following options is TRUE? |
| A. | P2 = Q3R2 |
| B. | Q2 = PR |
| C. | Q2 = R3P2 |
| D. | R = P2Q2 |
| Answer» C. Q2 = R3P2 | |
| 9. |
Which of the following options is the closest in the meaning to the word below: Inexplicable |
| A. | incomprehensible |
| B. | indelible |
| C. | inextricable |
| D. | infallible |
| Answer» B. indelible | |
| 10. |
The length of the path from v5 to v6 in the MST of previous question with n = 10 is |
| A. | 11 |
| B. | 25 |
| C. | 31 |
| D. | 41 |
| Answer» D. 41 | |
| 11. |
Consider the same data as given in previous question. After the update in the previous question, the link N1-N2 goes down. N2 will reflect this change immediately in its distance vector as cost, infinite. After the NEXT ROUND of update, what will be cost to N1 in the distance vector of N3? |
| A. | 3 |
| B. | 9 |
| C. | 10 |
| D. | Infinite |
| Answer» D. Infinite | |
| 12. |
Consider the data given in previous question. If all the flip-flops were reset to 0 at power on, what is the total number of distinct outputs (states) represented by PQR generated by the counter |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» C. 5 | |
| 13. |
Consider the same recursive C function that takes two arguments unsigned int foo(unsigned int n, unsigned int r) { if (n > 0) return (n%r + foo (n/r, r )); else return 0; } What is the return value of the function foo when it is called as foo(513, 2)? |
| A. | 9 |
| B. | 8 |
| C. | 5 |
| D. | 2 |
| Answer» E. | |
| 14. |
Consider the following recursive C function that takes two arguments unsigned int foo(unsigned int n, unsigned int r) { if (n > 0) return (n%r + foo (n/r, r )); else return 0; } What is the return value of the function foo when it is called as foo(345, 10) ?Consider the following recursive C function that takes two arguments unsigned int foo(unsigned int n, unsigned int r) { if (n > 0) return (n%r + foo (n/r, r )); else return 0; } What is the return value of the function foo when it is called as foo(345, 10) ? |
| A. | 345 |
| B. | 12 |
| C. | 5 |
| D. | 3 |
| Answer» C. 5 | |
| 15. |
Database table by name Loan_Records is given below. Borrower Bank_Manager Loan_Amount Ramesh Sunderajan 10000.00 Suresh Ramgopal 5000.00 Mahesh Sunderajan 7000.00 What is the output of the following SQL query? SELECT Count(*) FROM ( (SELECT Borrower, Bank_Manager FROM Loan_Records) AS S NATURAL JOIN (SELECT Bank_Manager, Loan_Amount FROM Loan_Records) AS T ); |
| A. | 3 |
| B. | 9 |
| C. | 5 |
| D. | 6 |
| Answer» D. 6 | |
| 16. |
An application loads 100 libraries at start-up. Loading each library requires exactly one disk access. The seek time of the disk to a random location is given as 10 ms. Rotational speed of disk is 6000 rpm. If all 100 libraries are loaded from random locations on the disk, how long does it take to load all libraries? (The time to transfer data from the disk block once the head has been positioned at the start of the block may be neglected) |
| A. | 0.50 s |
| B. | 1.50 s |
| C. | 1.25 s |
| D. | 1.00 s |
| Answer» C. 1.25 s | |
| 17. |
An 8KB direct-mapped write-back cache is organized as multiple blocks, each of size 32-bytes. The processor generates 32-bit addresses. The cache controller maintains the tag information for each cache block comprising of the following. 1 Valid bit 1 Modified bit As many bits as the minimum needed to identify the memory block mapped in the cache. What is the total size of memory needed at the cache controller to store meta-data (tags) for the cache? |
| A. | 4864 bits |
| B. | 6144 bits |
| C. | 6656 bits |
| D. | 5376 bits |
| Answer» E. | |
| 18. |
Four matrices M1, M2, M3 and M4 of dimensions pxq, qxr, rxs and sxt respectively can be multiplied is several ways with different number of total scalar multiplications. For example, when multiplied as ((M1 X M2) X (M3 X M4)), the total number of multiplications is pqr + rst + prt. When multiplied as (((M1 X M2) X M3) X M4), the total number of scalar multiplications is pqr + prs + pst. If p = 10, q = 100, r = 20, s = 5 and t = 80, then the number of scalar multiplications needed is: |
| A. | 248000 |
| B. | 44000 |
| C. | 19000 |
| D. | 25000 |
| Answer» D. 25000 | |
| 19. |
Which of the given options provides the increasing order of asymptotic complexity of functions f1, f2, f3 and f4? f1(n) = 2^n f2(n) = n^(3/2) f3(n) = nLogn f4(n) = n^(Logn) |
| A. | f3, f2, f4, f1 |
| B. | f3, f2, f1, f4 |
| C. | f2, f3, f1, f4 |
| D. | f2, f3, f4, f1 |
| Answer» B. f3, f2, f1, f4 | |
| 20. |
Consider the following table of arrival time and burst time for three processes P0, P1 and P2. Process Arrival time Burst Time P0 0 ms 9 ms P1 1 ms 4 ms P2 2 ms 9 ms The pre-emptive shortest job first scheduling algorithm is used. Scheduling is carried out only at arrival or completion of processes. What is the average waiting time for the three processes? |
| A. | 5.0 ms |
| B. | 4.33 ms |
| C. | 6.33 |
| D. | 7.33 |
| Answer» B. 4.33 ms | |
| 21. |
A deck of 5 cards (each carrying a distinct number from 1 to 5) is shuffled thoroughly. Two cards are then removed one at time from the deck. What is the probability that the two cards are selected with the number on the first card being one higher than the number on the second card? |
| A. | 1/5 |
| B. | 4/25 |
| C. | 1/4 |
| D. | 2/5 |
| Answer» B. 4/25 | |
| 22. |
Consider a finite sequence of random values X = { x1, x2,..., xn}. Let μx be the mean and σx be the standard deviation of X. Let another finite sequence Y of equal length be derived from this as yi = a*xi + b, where a and b are positive constants. Let μy be the mean and σy be the standard deviation of this sequence. Which one of the following statements is INCORRECT? |
| A. | Index position of mode of X in X is the same as the index position of mode of Y in Y |
| B. | Index position of median of X in X is the same as the index position of median of Y in Y. |
| C. | μy = aμx+b |
| D. | σy = aσx+b |
| Answer» E. | |
| 23. |
Consider a database table T containing two columns X and Y each of type integer. After the creation of the table, one record (X=1, Y=1) is inserted in the table. Let MX and My denote the respective maximum values of X and Y among all records in the table at any point in time. Using MX and MY, new records are inserted in the table 128 times with X and Y values being MX+1, 2*MY+1 respectively. It may be noted that each time after the insertion, values of MX and MY change. What will be the output of the following SQL query after the steps mentioned above are carried out? SELECT Y FROM T WHERE X=7; |
| A. | 127 |
| B. | 255 |
| C. | 129 |
| D. | 257 |
| Answer» B. 255 | |
| 24. |
Which one of the following options is CORRECT given three positive integers x, y and z, and a predicate? P(x) = ¬(x=1)∧∀y(∃z(x=y*z)⇒(y=x)∨(y=1)) |
| A. | P(x) being true means that x is a prime number |
| B. | P(x) being true means that x is a number other than 1 |
| C. | P(x) is always true irrespective of the value of x |
| D. | P(x) being true means that x has exactly two factors other than 1 and x |
| Answer» B. P(x) being true means that x is a number other than 1 | |
| 25. |
We are given a set of n distinct elements and an unlabeled binary tree with n nodes. In how many ways can we populate the tree with the given set so that it becomes a binary search tree? |
| A. | 0 |
| B. | 1 |
| C. | n! |
| D. | (1/(n+1)).2nCn |
| Answer» C. n! | |
| 26. |
On a non-pipelined sequential processor, a program segment, which is a part of the interrupt service routine, is given to transfer 500 bytes from an I/O device to memory. Initialize the address register Initialize the count to 500 LOOP: Load a byte from device Store in memory at address given by address register Increment the address register Decrement the count If count != 0 go to LOOP Assume that each statement in this program is equivalent to machine instruction which takes one clock cycle to execute if it is a non-load/store instruction. The load-store instructions take two clock cycles to execute. The designer of the system also has an alternate approach of using DMA controller to implement the same transfer. The DMA controller requires 20 clock cycles for initialization and other overheads. Each DMA transfer cycle takes two clock cycles to transfer one byte of data from the device to the memory. What is the approximate speedup when the DMA controller based design is used in place of the interrupt driven program based input-output? |
| A. | 3.4 |
| B. | 4.4 |
| C. | 5.1 |
| D. | 6.7 |
| Answer» B. 4.4 | |
| 27. |
What does the following fragment of C-program print? char c[] = "GATE2011"; char *p =c; printf("%s", p + p[3] - p[1]) ; |
| A. | GATE2011 |
| B. | E2011 |
| C. | 2011 |
| D. | 011 |
| Answer» D. 011 | |
| 28. |
Consider a hypothetical processor with an instruction of type LW R1, 20(R2), which during execution reads a 32-bit word from memory and stores it in a 32-bit register R1. The effective address of the memory location is obtained by the addition of a constant 20 and the contents of register R2. Which of the following best reflects the addressing mode implemented by this instruction for operand in memory? |
| A. | Immediate Addressing |
| B. | Register Addressing |
| C. | Register Indirect Scaled Addressing |
| D. | Base Indexed Addressing |
| Answer» E. | |
| 29. |
Let the page fault service time be 10ms in a computer with average memory access time being 20ns. If one page fault is generated for every 10^6 memory accesses, what is the effective access time for the memory? |
| A. | 21ns |
| B. | 30ns |
| C. | 23ns |
| D. | 35ns |
| Answer» C. 23ns | |
| 30. |
The lexical analysis for a modern computer language such as Java needs the power of which one of the following machine models in a necessary and sufficient sense? |
| A. | Finite state automata |
| B. | Deterministic pushdown automataDeterministic pushdown automataDeterministic pushdown automataDeterministic pushdown automataDeterministic pushdown automataDeterministic pushdown automataDeterministic pushdown automataDeterministic pushdown automata |
| C. | Non-Deterministic pushdown automata |
| D. | Turing Machine |
| Answer» B. Deterministic pushdown automataDeterministic pushdown automataDeterministic pushdown automataDeterministic pushdown automataDeterministic pushdown automataDeterministic pushdown automataDeterministic pushdown automataDeterministic pushdown automata | |
| 31. |
If the difference between expectation of the square of a random variable (E[X²]) and the square of the expectation of the random variable (E[X])² is denoted by R, then? |
| A. | R = 0 |
| B. | R < 0 |
| C. | R >= 0 |
| D. | R > 0 |
| Answer» D. R > 0 | |
| 32. |
A thread is usually defined as a "light weight process" because an operating system (OS) maintains smaller data structures for a thread than for a process. In relation to this, which of the following is TRUE? |
| A. | On per-thread basis, the OS maintains only CPU register state |
| B. | The OS does not maintain a separate stack for each thread |
| C. | On per-thread basis, the OS does not maintain virtual memory state |
| D. | On per-thread basis, the OS maintains only scheduling and accounting information |
| Answer» D. On per-thread basis, the OS maintains only scheduling and accounting information | |
| 33. |
The simplified SOP (Sum Of Product) form of the boolean expression (P + Q' + R') . (P + Q' + R) . (P + Q + R') is |
| A. | (P.Q + R) |
| B. | (P + Q.R) |
| C. | (P.Q + R) |
| D. | (P.Q + R) |
| Answer» C. (P.Q + R) | |
| 34. |
Consider a relational table with a single record for each registered student with the following attributes. 1. Registration_Num: Unique registration number of each registered student 2. UID: Unique identity number, unique at the national level for each citizen 3. BankAccount_Num: Unique account number at the bank. A student can have multiple accounts or join accounts. This attribute stores the primary account number. 4. Name: Name of the student 5. Hostel_Room: Room number of the hostel Which one of the following option is INCORRECT? |
| A. | BankAccount_Num is candidate key |
| B. | Registration_Num can be a primary key |
| C. | UID is candidate key if all students are from the same country |
| D. | If S is a superkey such that S∩UID is NULL then S∪UID is also a superkey |
| Answer» B. Registration_Num can be a primary key | |
| 35. |
A computer handles several interrupt sources of which the following are relevant for this question. . Interrupt from CPU temperature sensor (raises interrupt if CPU temperature is too high) . Interrupt from Mouse(raises interrupt if the mouse is moved or a button is pressed) . Interrupt from Keyboard(raises interrupt when a key is pressed or released) . Interrupt from Hard Disk(raises interrupt when a disk read is completed) Which one of these will be handled at the HIGHEST priority? |
| A. | Interrupt from Hard Disk |
| B. | Interrupt from Mouse |
| C. | Interrupt from Keyboard |
| D. | Interrupt from CPU temperature sensor |
| Answer» E. | |
| 36. |
HTML(Hypertext Markup Language) has language elements which permit certain actions other than describing the structure of the web document. Which one of the following actions is NOT supported by pure HTML (without any server or client side scripting)pages? A |
| A. | Embed web objects from different sites into the same page |
| B. | Refresh the page automatically after a specified interval |
| C. | Automatically redirect to another page upon download |
| D. | Display the client time as part of the page |
| Answer» E. | |
| 37. |
Which of the following pairs have DIFFERENT expressive power? |
| A. | Deterministic finite automata(DFA) and Non-deterministic finite automata(NFA) |
| B. | Deterministic push down automata(DPDA)and Non-deterministic push down automata(NPDA) |
| C. | Deterministic single-tape Turing machine and Non-deterministic single-tape Turing machine |
| D. | Single-tape Turing machine and multi-tape Turing machine |
| Answer» C. Deterministic single-tape Turing machine and Non-deterministic single-tape Turing machine | |
| 38. |
Which one of the following is NOT desired in a good Software Requirement Specifications (SRS) document? |
| A. | Functional Requirements |
| B. | Non-Functional Requirements |
| C. | Goals of Implementation |
| D. | Algorithms for Software Implementation |
| Answer» E. | |
| 39. |
A company needs to develop digital signal processing software for one of its newest inventions. The software is expected to have 40000 lines of code. The company needs to determine the effort in person-months needed to develop this software using the basic COCOMO model. The multiplicative factor for this model is given as 2.8 for the software development on embedded systems, while the exponentiation factor is given as 1.20. What is the estimated effort in person-months? |
| A. | 234.25 |
| B. | 932.50 |
| C. | 287.80 |
| D. | 122.40 |
| Answer» B. 932.50 | |
| 40. |
The time taken to switch between user and kernel modes of execution be t1 while the time taken to switch between two processes be t2. Which of the following is TRUE? |
| A. | t1 > t2 |
| B. | t1 = t2 |
| C. | t1 < t2 |
| D. | nothing can be said about the relation between t1 and t2 |
| Answer» D. nothing can be said about the relation between t1 and t2 | |
| 41. |
A company needs to develop a strategy for software product development for which it has a choice of two programming languages L1 and L2. The number of lines of code (LOC) developed using L2 is estimated to be twice the LOC developed with Ll. The product will have to be maintained for five years. Various parameters for the company are given in the table below. Parameter Language L1 Language L2 Man years needed for development LOC/10000 LOC/10000 Development cost per man year Rs. 10,00,000 Rs. 7,50,000 Maintenance time 5 years 5 years Cost of maintenance per year Rs. 1,00,000 Rs. 50,000 Total cost of the project includes cost of development and maintenance. What is the LOC for L1 for which the cost of the project using L1 is equal to the cost of the project using L2? |
| A. | 4000 |
| B. | 5000 |
| C. | 4333 |
| D. | 4667 |
| Answer» C. 4333 | |
| 42. |
Consider different activities related to email: m1: Send an email from a mail client to a mail server m2: Download an email from mailbox server to a mail client m3: Checking email in a web browser Which is the application level protocol used in each activity? |
| A. | m1: HTTP m2: SMTP m3: POP |
| B. | m1: SMTP m2: FTP m3: HTTP |
| C. | m1: SMTP m2: POP m3: HTTP |
| D. | m1: POP m2: SMTP m3: IMAP |
| Answer» D. m1: POP m2: SMTP m3: IMAP | |
| 43. |
If two fair coins are flipped and at least one of the outcomes is known to be a head, what is the probability that both outcomes are heads? |
| A. | 1/3 |
| B. | 1/4 |
| C. | 1/2 |
| D. | 2/3 |
| Answer» B. 1/4 | |
| 44. |
A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOT |
| A. | block entire HTTP traffic during 9:00PM and 5 :0OAM |
| B. | block all ICMP traffic |
| C. | stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP address |
| D. | block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AM |
| Answer» E. | |
| 45. |
In a compiler, keywords of a language are recognized during |
| A. | parsing of the program |
| B. | the code generation |
| C. | the lexical analysis of the program |
| D. | dataflow analysis |
| Answer» D. dataflow analysis | |