CPU and its components Questions

MCQ bookmark_border

51.

Control Unit of a digital computer is often called the

A

Clock

B

Nerve center

C

ICs

D

All of the above

E

None of the above

Correct Answer: B

Control Unit of a digital computer is often called the Nerve center

Check Answer report_problem Report forum Discussion

MCQ bookmark_border

52.

The unit of a computer system that executes program, communicates with and often controls the operation of other subsystems of the computer is known as

A

CPU

B

Control Unit

C

I/O unit

D

Peripheral unit

E

None of the above

Correct Answer: A

CPU : A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions. The computer industry has used the term "central processing unit" at least since the early 1960s. Traditionally, the term "CPU" refers to a processor, more specifically to its processing unit and control unit (CU), distinguishing these core elements of a computer from external components such as main memory and I/O circuitry. Source : wikipedia.org

Check Answer report_problem Report forum Discussion

MCQ bookmark_border

53.

Time during which a job is processed by the computer is

A

Delay time

B

Real time

C

Execution time

D

Down time

E

None of the above

Correct Answer: C

In computer science, run time, runtime or execution time is the time during which a program is running (executing), in contrast to other program lifecycle phases such as compile time, link time and load time.

Check Answer report_problem Report forum Discussion

MCQ bookmark_border

54.

The ALU of a computer normally contains a number of high speed storage elements called

A

semiconductor memory

B

registers

C

hard disk

D

magnetic disk

E

None of the above

Correct Answer: B

ALU : An arithmetic logic unit (ALU) is a combinational digital electronic circuit that performs arithmetic and bitwise operations on integer binary numbers. This is in contrast to a floating-point unit (FPU), which operates on floating point numbers. An ALU is a fundamental building block of many types of computing circuits, including the central processing unit (CPU) of computers, FPUs, and graphics processing units (GPUs). A single CPU, FPU or GPU may contain multiple ALUs.

Check Answer report_problem Report forum Discussion

MCQ bookmark_border

55.

Which of the following registers is loaded with the contents of the memory location pointed by the PC?

A

Memory Address Register

B

Memory Data Register

C

Instruction Register

D

Program Counter

E

None of the above

Correct Answer: C

In computing, an instruction register (IR) is the part of a CPU's control unit that holds the instruction currently being executed or decoded.

Check Answer report_problem Report forum Discussion

MCQ bookmark_border

56.

A memory bus is mainly used for communication between

A

processor and memory

B

processor and I/O devices

C

I/O devices and memory

D

input device and output device

E

None of the above

Correct Answer: A

The memory bus is a type of computer bus, usually in the form of a set of wires or conductors which connects electrical components and allow transfers of data and addresses from the main memory to the central processing unit (CPU) or a memory controller. Source : techopedia.com

Check Answer report_problem Report forum Discussion

MCQ bookmark_border

57.

Which of the following registers hold the information before it goes to the decoder

A

control register

B

data register

C

accumulator

D

address register

E

None of the above

Correct Answer: B

None.

Check Answer report_problem Report forum Discussion

MCQ bookmark_border

58.

The register which keeps track of the execution of a program and which contains the memory address of the instruction currently being executed is known as

A

Index register

B

Memory address register

C

Program counter

D

Instruction register

E

None of the above

Correct Answer: C

Program counter : A program counter is a register in a computer processor that contains the address (location) of the instruction being executed at the current time. As each instruction gets fetched, the program counter increases its stored value by 1. After each instruction is fetched, the program counter points to the next instruction in the sequence. When the computer restarts or is reset, the program counter normally reverts to 0. Source : techtarget.com

Check Answer report_problem Report forum Discussion

MCQ bookmark_border

59.

A physical connection between the microprocessor memory and other parts of the microcomputer is known as

A

Path

B

Address bus

C

Route

D

All of the above

E

None of the above

Correct Answer: B

None.

Check Answer report_problem Report forum Discussion

MCQ bookmark_border

60.

If, in a computer, 16 bits are used to specify addresses in a RAM, the number of addresses will be

A

216

B

65536

C

64K

D

Any of the above

E

None of the above

Correct Answer: D

None.

Check Answer report_problem Report forum Discussion