Explore topic-wise MCQs in Testing Subject.

This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.

1.

User-visible registers enable the machine or programmer to

A. Minimize Compiler
B. Minimize Register
C. Minimize Control
D. Minimize Main Memory usage
Answer» E.
Discussion
2.

The unit of data exchange between cache and main memory is known as

A. Cache Memory
B. Cache Size
C. Block Size
D. Mapping Function
Answer» D. Mapping Function
Discussion
3.

Which registers can interact with the secondary storage ?

A. MAR
B. PC
C. IR
D. R0
Answer» B. PC
Discussion
4.

The time delay between two successive initiation of memory operation _______ .

A. Memory access time
B. Memory search time
C. Memory cycle time
D. Instruction delay
Answer» D. Instruction delay
Discussion
5.

______ is generally used to increase the apparent size of physical memory .

A. Secondary memory
B. Virtual memory
C. Hard-disk
D. Disks
Answer» C. Hard-disk
Discussion
6.

To reduce the memory access time we generally make use of ______ .

A. Heaps
B. Higher capacity RAM’s
C. SDRAM’s
D. Cache’s
Answer» E.
Discussion
7.

Which of the register/s of the processor is/are connected to Memory Bus ?

A. PC
B. MAR
C. IR
D. Both a and b
Answer» C. IR
Discussion
8.

The I/O interface required to connect the I/O device to the bus consists of ______

A. Address decoder and registers
B. Control circuits
C. Both a and b
D. Only b
Answer» D. Only b
Discussion
9.

A privilege exception is raised,

A. When a process tries to change the mode of the system
B. When a process tries to change the piority level of the other processes
C. When a process tries to access the memory allocated to other user
D. All of the above
Answer» E.
Discussion
10.

Computer A having clock cycle time of 250 ps and cycle per instruction of 2.0 for some programs, and computer B having clock cycle time of 500 ps and a cycle per instruction of 1.2 for the same program. Which one is faster for this program

A. Computer A
B. Computer B
C. Both will have same time
D. None of the above
Answer» B. Computer B
Discussion
11.

When the PC having Clock rate of 2 and the CPU clock cycle for a program is 4 then Execution time of this computer for a program will be

A. 1
B. 1.5
C. 1.75
D. 2
Answer» E.
Discussion
12.

The procedure when call procedure that has been called, saving the registers it wants for using, when the caller has been left unrestrained, is known as

A. Caller saving
B. Calls
C. Callee saving
D. Jumps
Answer» D. Jumps
Discussion
13.

The decoded instruction is stored in ______ .

A. IR
B. PC
C. Registers
D. MDR
Answer» B. PC
Discussion
14.

Way in which computer components are connected with each another is called

A. computer layout
B. computer architecture
C. computer parts
D. computer hardware
Answer» C. computer parts
Discussion
15.

Which of the following affects processing power?

A. Data bus capacity
B. Addressing scheme
C. Clock speed
D. All of the above
Answer» E.
Discussion
16.

________________ organization is essentially an array of selectively open and closed unidirectional contacts.

A. ROM
B. RAM
C. Computer
D. All of the above
Answer» B. RAM
Discussion
17.

Processor-I/O involves data transferring between

A. Computers
B. Processor and I/O modules
C. Registers
D. User Processes
Answer» C. Registers
Discussion
18.

Data and instructions that are being used frequently are stored in

A. Cache
B. Block
C. hard disk
D. main memory
Answer» C. hard disk
Discussion
19.

Data register can be assigned to a

A. Variety of Functions
B. Variety of Devices
C. Variety of Programs
D. Variety of systems
Answer» B. Variety of Devices
Discussion
20.

I/O instruction Status tests various

A. Control Conditions
B. Status conditions
C. I/O device
D. Memory
Answer» C. I/O device
Discussion
21.

PerformanceX = 1/ Execution Time x the given relation shows that

A. Performance is increased when execution time is decreased
B. Performance is increased when execution time is increased
C. Performance is decreased when execution time is decreased
D. None
Answer» B. Performance is increased when execution time is increased
Discussion
22.

The _______________ of the desired memory location is applied to the address input terminals.

A. Name
B. Address
C. Number
D. Level
Answer» C. Number
Discussion
23.

The instruction -> Add LOCA,R0 does,

A. Adds the value of LOCA to R0 and stores in the temp register
B. Adds the value of R0 to the address of LOCA
C. Adds the values of both LOCA and R0 and stores it in R0
D. Adds the value of LOCA with a value in accumulator and stores it in R0
Answer» D. Adds the value of LOCA with a value in accumulator and stores it in R0
Discussion
24.

Graph coloring gives best results, when there are at-least

A. 16 general-purpose registers
B. 24 general-purpose registers
C. 32 general-purpose registers
D. 64 general-purpose registers
Answer» B. 24 general-purpose registers
Discussion
25.

The EPROM eraser will emit________________ light.

A. Fluorescent
B. LED
C. Laser
D. UV
Answer» E.
Discussion
26.

Branch instruction is also known as

A. jump instruction
B. logical instruction
C. arithmetic instruction
D. programmed instructions
Answer» B. logical instruction
Discussion
27.

Branch instruction 'JUMP TO SUBORDINATE' is an example of

A. unconditional branch
B. arithmetic branch
C. transferring branch
D. conditional branch
Answer» B. arithmetic branch
Discussion
28.

I/O instruction Transfer used to read the

A. Data
B. Information
C. Instructions
D. Description
Answer» B. Information
Discussion
29.

The High level language, referred as human language, is converted into the computer instructions via

A. Compiler
B. Interpreter
C. Hardware system
D. Software system
Answer» C. Hardware system
Discussion
30.

Two main types of branch instructions are

A. conditional branch
B. unconditional branch
C. logical branch
D. both a and b
Answer» E.
Discussion
31.

In data processing, processor perform some

A. Arithmetic or logic operation on information
B. Arithmetic or logic operation on instruction
C. Arithmetic or logic operation on programs
D. Arithmetic or logic operation on data
Answer» E.
Discussion
32.

Basic unit of computer is

A. ALU
B. CU
C. I/O unit
D. all of these
Answer» E.
Discussion
33.

Condition codes are bits typically set by the

A. Processor execution
B. processor operation
C. Processor hardware
D. Processor software
Answer» D. Processor software
Discussion
34.

The internal Components of the processor are connected by _______ .

A. Processor intra-connectivity circuitry
B. Processor bus
C. Memory bus
D. Rambus
Answer» C. Memory bus
Discussion
35.

Data moved between computer components through

A. I/O Processor
B. I/O Modules
C. I/O Devices
D. I/O Buffers
Answer» C. I/O Devices
Discussion
36.

A first goal of compiler writer

A. Correctness
B. Fast performance
C. Callee saving
D. Data dependence
Answer» B. Fast performance
Discussion
37.

When a logic circuit diagram is given, you can analyse the circuit to obtain the _____________.

A. Result
B. Input
C. Logic Expression
D. None of the above
Answer» D. None of the above
Discussion
38.

In a sequential memory, the words are stored in and out in a sequence.

A. Write
B. Read
C. Write/Read
D. All of the above
Answer» C. Write/Read
Discussion
39.

If the instruction, Add R1,R2,R3 is executed in a system which is pipe-lined, then the value of S is (Where S is term of the Basic performance equation)

A. 3
B. ~2
C. ~1
D. 6
Answer» D. 6
Discussion
40.

In Breakpoint mode of operation,

A. The program is interrupted after each detection
B. The program will not be stopped and the errors are sorted out after the complete program is scanned
C. There is no effect on the program, i.e the program is executed without rectification of errors
D. The program is alted only at specific points
Answer» E.
Discussion
41.

The programs which are used for translating the symbolic-language into the machine-language are

A. Compiler
B. Assemblers
C. Interpreters
D. All above
Answer» C. Interpreters
Discussion
42.

One of the complex jobs of the compiler writer, is to figure-out what instruction sequence will be used best for each segment, named as

A. Simplify trade-offs among alternatives
B. Stack height reduction
C. Local optimizations
D. Jumps
Answer» B. Stack height reduction
Discussion
43.

The average number of steps taken to execute the set of instructions can be made to be less than one by following _______ .

A. ISA
B. Pipe-lining
C. Super-scaling
D. Sequential
Answer» D. Sequential
Discussion
44.

Computer bus which moves data between the central processor and memory is called

A. I/O bus
B. CPU bus
C. processor bus
D. data bus
Answer» E.
Discussion
45.

Which of the following are examples of input devices?

A. Visual display unit, dot matrix printer, laser printer
B. Keyboard, mouse, and optical mark reader
C. Arithmetic and logic unit, the control unit
D. RAM, ROM, PROM
Answer» C. Arithmetic and logic unit, the control unit
Discussion
46.

Computer bus which allows the processor to communicate with peripheral devices is

A. expansion bus
B. system bus
C. memory bus
D. processor bus
Answer» B. system bus
Discussion
47.

Type of computer bus which connects the CPU to a memory on the system board is

A. system bus
B. word bus
C. expansion bus
D. width bus
Answer» B. word bus
Discussion
48.

Synchronous means _______

A. At irregular intervals
B. At same time
C. At variable time
D. None of these
Answer» C. At variable time
Discussion
49.

Control and Status registers used by the processor to control

A. Design of the Processor
B. Operation of the Processor
C. Speed of the Processor
D. Execution of the Processor
Answer» C. Speed of the Processor
Discussion
50.

A+B in assembly language will be written as

A. add AB
B. addition AB
C. add A,B
D. addition A,B
Answer» D. addition A,B
Discussion