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MCQOPTIONS
This section includes 883 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics & Communication Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Read the following statements about files in Pascal 1. A file is a data structure which consists of a sequence of components of the same type.2. The number of components in a file is variable.3. The components in a file can be accessed only sequentially starting from the beginning of the file. Which of the above are correct? |
| A. | All |
| B. | 1 and 2 only |
| C. | 2 and 3 only |
| D. | 1 and 3 only |
| Answer» B. 1 and 2 only | |
| 252. |
Consider the following C program int ramfloat alpha, gammaram = 6400alpha = 0.562gamma = alpha * ram + 1Now consider the following statements about this program1. ram is an integer variable2. alpha, gamma are real variables3. *, + are arithmetic operators4. 0.562 may be an integer constant or real constantWhich of the above are correct? |
| A. | All |
| B. | 1, 2, 3 only |
| C. | 2, 3, 4 only |
| D. | 1, 2, 4 only |
| Answer» C. 2, 3, 4 only | |
| 253. |
In 8086 the number of lines on which data and address is multiplexed is |
| A. | 8 |
| B. | 16 |
| C. | 20 |
| D. | 32 |
| Answer» D. 32 | |
| 254. |
Read the following statements about Excel 1. It supports many arithmetic functions like SUM, ABS, EXP, INT, MOD etc.2. It supports many trigonometric functions.3. It supports IRR function to calculate interest rate.4. It supports PV function to calculate the present value of future receipts. Which of the above are correct? |
| A. | All |
| B. | 1, 2 and 3 only |
| C. | 1, and 2 only |
| D. | 1 only |
| Answer» B. 1, 2 and 3 only | |
| 255. |
FORTRAN expression for √(3b²-5a²) is |
| A. | SQRT (3 * B ** 2 - 5 * A ** 2) |
| B. | SQRT 3 * B ** 2 - 5 * A ** 2 |
| C. | SQRT (3 * b ** 2 - 5 * a ** 2) |
| D. | SQRT (3 * B ** 2) - SQRT (5 * A **2) |
| Answer» B. SQRT 3 * B ** 2 - 5 * A ** 2 | |
| 256. |
Consider the following statement in Basic15 INPUT X, Y, Z20 IF Y > X THEN 2521 IF Z > Y THEN 3025 PRINT Y30 PRINT Z, X35 ENDIF X, Y, Z are 150, 200, 250 then the output will be |
| A. | 200, 250, 150 respectively |
| B. | 150, 200, 250 respectively |
| C. | 250, 200, 150 respectively |
| D. | 200, 150, 250 respectively |
| Answer» B. 150, 200, 250 respectively | |
| 257. |
Consider the following logical IF statement in FORTRAN 77IF (SALT. GE. PEPPER) GOTO 11GOTO 13The above statement using arithmetic IF statement would be |
| A. | IF (SALT - PEPPER) 11, 11, 13 |
| B. | IF (SALT - PEPPER) 13, 11, 13 |
| C. | IF (SALT - PEPPER) 13, 11, 11 |
| D. | IF (SALT - PEPPER) 11, 13, 13 |
| Answer» D. IF (SALT - PEPPER) 11, 13, 13 | |
| 258. |
If x = 0.1396 radians, the values of 1 - cos x and 2 sin² (x / 2) using floating point arithmetic with a 4 digit mantissa are respectively |
| A. | .1000 E - 1 each |
| B. | .9727 E - 2 each |
| C. | .1000 E - 1 and .9727 E - 2 respectively |
| D. | .9727 E - 2 and .1000 E - 1 respectively |
| Answer» D. .9727 E - 2 and .1000 E - 1 respectively | |
| 259. |
The expression A² + B² - 3 AB when written is Pascal should be written as |
| A. | A * A + B * B - 3 A * B |
| B. | A * A + B * B - 3.0 A * B |
| C. | A * A + B * B - 3.0 * A * B |
| D. | A * A + B * A - 3 * A * B |
| Answer» D. A * A + B * A - 3 * A * B | |
| 260. |
Consider the following statements about data structures in Pascal 1. Arrays and files are types of data structures.2. List structure is not a data structure in Pascal.3. Each element of a binary tree is called a node of the tree. Which of the above are statements correct? |
| A. | All |
| B. | 1, and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» D. 2 and 3 only | |
| 261. |
The normalised form of 0.0152 x 10¹⁸ is |
| A. | 0.152 x 10¹⁷ |
| B. | 1.52 x 10¹⁶ |
| C. | 15.2 x 10¹⁵ |
| D. | 152 x 10¹⁴ |
| Answer» B. 1.52 x 10¹⁶ | |
| 262. |
The instruction MOV r1, r2 in 8085 |
| A. | causes contents of registers r2 to be moved to r, and uses register addressing |
| B. | causes contents of registers r1 to be moved to r2 and uses register addressing |
| C. | causes contents of registers r1 to be moved to r2 and uses register immediate addressing |
| D. | causes contents of registers r2 to be moved to r1 and uses register immediate addressing |
| Answer» B. causes contents of registers r1 to be moved to r2 and uses register addressing | |
| 263. |
Read the following statements about files in Pascal 1. A file can grow or shrink dynamically.2. A file which consists of only characters is called text file.3. Text files may be read and written using standard Pascal READ and WRITE procedures.4. Every file must have a beginning but may or may not have an end. Which of the above are correct? |
| A. | All |
| B. | 1, 2, 3 only |
| C. | 2, 3, 4 only |
| D. | 1, 2 and 4 only |
| Answer» C. 2, 3, 4 only | |
| 264. |
Consider the following features of 'structures' in C?1. The values of a structure variable can be assigned to another structure variable of the same type using the assignment operator.2. One structure can be nested within another structure.3. A variable structure can also be passed to a function. Which of the above are correct? |
| A. | All |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» B. 1 and 2 only | |
| 265. |
Consider the followingON GO TO statement in Basic35 ON A GO TO 15, 25, 35If the value of A is 2.6, the control will transfer to |
| A. | line 15 |
| B. | line 25 |
| C. | line 35 |
| D. | any of the lines 15 or 25, 35 |
| Answer» C. line 35 | |
| 266. |
Consider the following rules about integer constant in C 1. An integer constant must have at least one digit.2. An integer constant must not have a decimal point.3. An integer constant may be positive or negative.4. The default sign is positive.5. A maximum of one comma or blank is allowed. Which of the above are correct? |
| A. | All |
| B. | 1, 2, 3, 4 only |
| C. | 1, 2, 3, 5 |
| D. | 2, 3, 4, 5 only |
| Answer» C. 1, 2, 3, 5 | |
| 267. |
Consider the following program in Basic10 READ X, Y, Z15 DATA 20, 30, 1020 S = X + Y + Z30 A = S/335 PRINT S, A, X, Y, Z40 ENDThe output will be |
| A. | 60, 20, 20, 30, 10 |
| B. | 10, 30, 20, 20, 60 |
| C. | 60, 20, 30, 10, 20 |
| D. | 60, 30, 10, 20, 20 |
| Answer» B. 10, 30, 20, 20, 60 | |
| 268. |
If CS = A̅₁₅ A₁₄ A₁₃ is used as chip select logic of a 4 K RAM in 8085 system, its memory range is |
| A. | 3000 H - 3 FFF H |
| B. | 7000 H - 7 FFFH |
| C. | 5000 H - 5 FFF H and 6000 H - 6 FFF H |
| D. | 6000 H - 6 FFF H and 7000 H - 7 FFF H |
| Answer» E. | |
| 269. |
Read the following statements 1. Magnetic tape is a sequential device.2. Magnetic disc is a direct access device.3. Magnetic tape and disc are both sequential devices.4. Magnetic tape and disc are both direct access devices. Which of the above statements are correct? |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 4 only |
| D. | 1, 2 and 3 only |
| Answer» B. 1 and 3 only | |
| 270. |
A computer program is used to read N and print the sum 1² + 2² + 3² +.....+ N². If N = 10, the print out will show the number |
| A. | 100 |
| B. | 10 |
| C. | 385 |
| D. | 285 |
| Answer» D. 285 | |
| 271. |
Consider the instructions 1. MOV M, B2. OUT 43. LDAX Which of the above require memory write cycle? |
| A. | 1, 2, 3 |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» D. 2 and 3 only | |
| 272. |
Consider the following in Cint kfloat a ;k = 4.2a = 300The values stored in computer memory for k and a are respectively |
| A. | 4.2 and 300 |
| B. | 4 and 300 respectively |
| C. | 4.2 and 300.00 respectively |
| D. | 4 and 300.00 respectively |
| Answer» E. | |
| 273. |
Consider the following program for 8085MVIA, 00HMVIA, 53HCMAThe contents of accumulator at the end of this program will be |
| A. | OACH |
| B. | 53 H |
| C. | OADH |
| D. | 54 H |
| Answer» B. 53 H | |
| 274. |
Consider the following program in Cint k;float a, b, c;k = a* b* c / 100 + 2.5 / 2 - 0.3 * 9if a - 5.0, b = 2.0 and c = 3.0 the final result k = |
| A. | 1 |
| B. | - 1 |
| C. | + 1.15 |
| D. | - 1.15 |
| Answer» C. + 1.15 | |
| 275. |
Consider the instructions 1. MOV M, B2. OUT 43. LDA X Which of the above uses IO/W cycle? |
| A. | 1 only |
| B. | 1 and 2 only |
| C. | 2 only |
| D. | 3 only |
| Answer» D. 3 only | |
| 276. |
Consider the following operation in a computer1. Multiplication of scalar2. Iversion of matrix3. Printing a line of 120 characters on a printer Which of the above is a subroutine? |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 1, 2 and 3 |
| D. | 2 only |
| Answer» D. 2 only | |
| 277. |
Consider the following statements about 'Functions' in C 1. A function can be called any number of times.2. A function gets called when the function name is followed by a semicolon.3. The order in which functions are defined in a program and the order in which they are called must be the same. Which of the above statements are correct? |
| A. | All |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» C. 1 and 3 only | |
| 278. |
Let JCOKE = 98 and LPEPSI = 42 Consider the statementIF (JCOKE - 3 * LPEPSI) 5, 6, 75 JCOKE = JCOKE + 56 JCOKE = JCOKE + 87 JCOKE = JCOKE + 11The value of JCOKE after the execution of above statement will be |
| A. | 103 |
| B. | 106 |
| C. | 109 |
| D. | none of the above |
| Answer» B. 106 | |
| 279. |
The correct form of expression B³ -2 A C in FORTRAN 77 is |
| A. | B * * 3 - 2 * A * C |
| B. | B * 3 - 2 * A AC |
| C. | B * * 3 - 2 ** A * C |
| D. | B *** 3 - 2 * A * C |
| Answer» B. B * 3 - 2 * A AC | |
| 280. |
Consider the following in C 1. Arithmetic operations can be performed on ints.2. Arithmetic operations can be performed on floats.3. Arithmetic operation can be performed on chars. Which of the above are correct? |
| A. | All |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» B. 1 and 2 only | |
| 281. |
Consider the following program in Cint kfloat b ;k = 3b = 10.1k = k / bThe final result would be k = |
| A. | 0.297 |
| B. | 0.2 |
| C. | 0 |
| D. | 3 |
| Answer» D. 3 | |
| 282. |
If J = 12 and X = 24.4 , the result of the following FORTRAN 77 program will be READ *, J, XK = J ** 2Z = 3 * XPrint *, J, K, Z |
| A. | 12, 144, 73.2 |
| B. | 15.0, 144.0, 73.2 |
| C. | 15.0, 144.0, 73 |
| D. | 15. 144. 73 |
| Answer» B. 15.0, 144.0, 73.2 | |
| 283. |
Consider the following in C 1. An arithmetic operation between integer and an integer gives integer as the result.2. An arithmetic operation between a real and a real constant gives real constant as the result.3. An arithmetic operation between an integer constant and a real constant is not valid. Which of the above are correct? |
| A. | All |
| B. | 1 and 2 only |
| C. | 2 and 3 only |
| D. | 1 and 3 only |
| Answer» C. 2 and 3 only | |
| 284. |
Read the following statements as regards register pairs in microprocessor 80851. B represents B, C pair with B as high order register and C as low order register.2. D represents D, E pair with D as high order register and E as low order register.3. H represents H, L pair with H as high order register and L as low order register. Which of the above statements are correct? |
| A. | All |
| B. | 1 and 3 |
| C. | 1 and 2 |
| D. | 2 and 3 only |
| Answer» B. 1 and 3 | |
| 285. |
Consider the following statements for 8085 1. The most significant 8 bits of address are transmitted on the 8 lines on which data is transmitted.2. Eight pins are dedicated to transmit the most significant 8 bits of memory address.3. The least significant 8 bits of address are transmitted on the lines on which data is transmitted.4. The data and leass significant 8 bits are transmitted at different points in time.Which of the above statements are correct? |
| A. | all |
| B. | 1, 2 and 3 only |
| C. | 2, 3 and 4 only |
| D. | 1, 3 and 4 only |
| Answer» D. 1, 3 and 4 only | |
| 286. |
Read the following statement 1. Multi-processing operation permits highly efficient parallel processing at several levels.2. Multi processing involves use of several processing units jointly on a common program and severally on different programs.3. In multi-processing the assignment of facilities to tasks, loading of programs and monitoring of I/O activity is taken care of by operating system. Which of the above are correct? |
| A. | All |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» B. 1 and 2 only | |
| 287. |
System bus is the communication channel between microprocessor and peripherals. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 288. |
Consider the following statements about constants in 8085 1. The assembler treats 64 H as hexadecimal constant.2. The assembler treats 154 as binary constant.3. The assembler treats 540 as octal constant.4. The assembler treats 138 as decimal constant. Which of the above are correct? |
| A. | 1, 2 and 3 only |
| B. | 1, 3 and 4 only |
| C. | 1 and 3 only |
| D. | 2 and 4 only |
| Answer» C. 1 and 3 only | |
| 289. |
Which of the following is invalid integer variable name in Fortran? |
| A. | IAEG |
| B. | I 124 |
| C. | AILG |
| D. | MI AC |
| Answer» D. MI AC | |
| 290. |
Read the following rules for scanning Boolean expressions in Pascal 1. The expressions are scanned from left to right.2. The operations are scanned in the order NOT, AND, OR.3. All operators (i.e., NOT, AND and OR) are scanned together.4. In one scanning all the operators of only one type are scanned. Which of the above are correct? |
| A. | All |
| B. | 1, 2 and 3 only |
| C. | 1, 2 and 4 only |
| D. | 2, 3 and 4 only |
| Answer» D. 2, 3 and 4 only | |
| 291. |
Consider the following program in Basic5 READ R10 D = 2 * R20 A = 3.1416 * D * D / 430 PRINT AAssuming that R = 3.0, the output A = |
| A. | 2.827 |
| B. | 28.27 |
| C. | 282.7 |
| D. | 2827 |
| Answer» C. 282.7 | |
| 292. |
Which of the following assembler directives in 8085 does not cause any memory location to be used μp? |
| A. | D S |
| B. | D B |
| C. | D W |
| D. | E Q U |
| Answer» E. | |
| 293. |
Consider the following about 'arrays' in C 1. An array is a collection of similar elements.2. An array can not have 10 numbers 5 of which are ints and 5 are floats.3. An array can have ints and chars in the same array. Which of the above are correct? |
| A. | All |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» C. 1 and 3 only | |
| 294. |
Consider the following tasks in a micro computer 1. Receiving data and instruction2. Performing arithmetic computation3. Performing logical computations4. Storing data and instructions Which of the above are performed by ALU? |
| A. | 2 only |
| B. | 2 and 3 only |
| C. | 1, 2 and 3 only |
| D. | All |
| Answer» C. 1, 2 and 3 only | |
| 295. |
Consider the series given below. Which of the following is true for this series? |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 296. |
Simpson's rule for numerical integration is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 297. |
It is desired to evaluate the expression F = B cos Y + C cos² Y + A cos³ Y The Pascal equivalent to ensure minimum computer time should be written as |
| A. | F = B * COS (Y) + C * SQR (COS (Y) + A * COS (Y) * COS (Y) * COS (Y) |
| B. | F = B * COS (Y) + C * SQR [COS (Y)] + A * COS (Y) * SQR [COS (Y)] |
| C. | F = B * COS (Y) + C * COS(Y) * COS (Y) + A * COS (Y) * COS (Y) * COS (Y) |
| D. | X = COS(Y)Z = SQR (X)F = B * X + C * Z + A * X * Z |
| Answer» E. | |
| 298. |
Read the following statements about address space in microprocessors 1. An address space is a set of all possible addresses which can be generated by a microprocessor.2. Each address in the address space allows a designer to provide at least one memory or I/O location in the system.3. Two types of address spaces are memory and I/O address space.4. Some micro processors have only one type of address space. Which of the above are correct? |
| A. | All |
| B. | 1, 2, 3 only |
| C. | 1, 2, 4 only |
| D. | 1, 3, 4 only |
| Answer» B. 1, 2, 3 only | |
| 299. |
In FORTRAN 77 the correct way to write mathematical expression A/BC - D2 is be |
| A. | A / (B * C) - D ** 2 |
| B. | A / B - C - D ** 2 |
| C. | A / BC - D ** 2 |
| D. | none of the above |
| Answer» B. A / B - C - D ** 2 | |
| 300. |
The input to ALU are the contents of accumulator and temporary register. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |