IPRC Mahendragiri ISRO Technical Assistant Computer Science Paper 2016
Memories in which any location can be reached in a fixed (and short) amount of time after specifying its address is called
(a) sequential-access memory
(b) Random-access memory
(c) Secondary memory
(d) Mass storage
The register which holds the address of the location to or from which data are to be transferred is called
(a) index register
(b) instruction register
(c) memory address
(d) memory data register
A memory bus is mainly used for communication between
(a) processor and memory
(b) processor and I/O
(c) I/O devices and memory
(d) input device and output device
In which addressing modes the contents of a register specified in the instructions are first decremented, and then these contents are used as the effective address of the operands?
(a) Index addressing
(b) indirect addressing
(c) auto increment
(d) auto decrement
The CPU after receiving an interrupt from an I/O device
(a) hands over control of address bus and data bus to the interrupting device
(b) halts for a predetermined time
(c) branches off to the interrupt serice routine immediately
(d) branches off to the interrupt service routine after completion of the current instruction
Which of the following applications are best handled in ROM?
(a) Storage of protected
(b) Storage of temporary
(c) Storage of the operating
(d) Storage for microprograms
A microprocessor with 12 address lines is capable of addressing
(a) 1024 locations
(b) 2048 locations
(c) 4096 locations
(d) 64 K locations
Which of the following registers holds the information before it goes to the decoder?
(a) Control register
(b) Data register
(c) Accumulator
(d) Address register
Data encryption
(a) is most used by finanical networks
(b) is most used by public bill board networks
(c) cannot be used by private installations
(d) is not necessary, since data cannot be intercepted
The parity bit is added for which purposes
(a) coding
(b) indexing
(c) error detection
(d) updating
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