TCS Previous Years Solved Sample Placement Papers
- A 2MB PCM (pulse code modulation) has:
(a) 32 channels
(b) 30 voice channels & 1 signalling channel
(c) 31 voice channels & 1 signalling channel (Ans)
(d) 32 channels out of which 30 voice channels, 1 signalling channel, & 1 Synchronization channel - Time taken for 1 satellite hop in voice communication is:
(a) 1/2 second (Ans)
(b) 1 second
(c) 4 seconds
(d) 2 seconds - A dishonest shopkeeper professes to sell pulses at the cost price but uses a false weight of 950 gm for a kg. His gain is ...%.
- Max number of satellite hops allowed in voice communication is:
(a) only one
(b) more than one
(c) two hops (Ans)
(d) four hops - Conditional results after execution of an instruction in a microprocessor are stored in:
(a) register
(b) accumulator
(c) flag register
(d) flag register part of PSW (Program Status Word) (Ans) - Frequency at which VOICE is sampled is:
(a) 4 kHz (Ans)
(b) 8 kHz
(c) 16 kHz
(d) 64 kHz - Line of Sight is:
(a) Straight Line
(b) Parabolic
(c) Tx & Rx should be visible to each other (Ans)
(d) none - Purpose of PC (Program Counter) in a MicroProcessor is:
(a) To store address of TOS (Top Of Stack)
(b) To store address of next instruction to be executed (Ans)
(c) count the number of instructions
(d) to store base address of the stack - What action is taken when the processor under execution is interrupted by a non-maskable interrupt?
(a) Processor serves the interrupt request after completing the execution of the current instruction (Ans)
(b) Processor serves the interrupt request after completing the current task
(c) Processor serves the interrupt request immediately
(d) Processor serving the interrupt request depends upon the priority of the current task under execution - The status of the Kernel is:
(a) task
(b) process (Ans)
(c) not defined
(d) none of the above - To send a data packet using datagram, connection will be established:
(a) before data transmission
(b) connection is not established before data transmission
(c) no connection is required (Ans)
(d) none of the above - Word alignment is:
(a) aligning the address to the next word boundary of the machine (Ans)
(b) aligning to even boundary
(c) aligning to word boundary
(d) none of the above - When a 'C' function call is made, the order in which parameters passed to the function are pushed into the stack is:
(a) left to right
(b) right to left (Ans)
(c) bigger variables are moved first than the smaller variables
(d) smaller variables are moved first than the bigger ones
(e) none of the above - What is the type of signalling used between two exchanges?
(a) inband (Ans)
(b) common channel signaling
(c) any of the above
(d) none of the above - Buffering is:
(a) the process of temporarily storing the data to allow for small variation in device speeds (Ans)
(b) a method to reduce cross talks
(c) storage of data within transmitting medium until the receiver is ready to receive
(d) a method to reduce routing overhead - Memory allocation of variables declared in a program is:
(a) allocated in RAM
(b) allocated in ROM
(c) allocated on stack (Ans)
(d) assigned to registers - A software that allows a personal computer to pretend as a computer terminal is:
(a) terminal adapter
(b) bulletin board
(c) modem
(d) terminal emulation (Ans) - Find the output of the following program:
int *p, *q; p = (int *)1000; q = (int *)2000; printf("%d", (q - p));Ans: 500 - Which addressing mode is used in the following statements:
(a) MVI B,55 (Immediate addressing mode)
(b) MOV B,A (Register Addressing Mode)
(c) MOV M,A (Direct addressing mode)
- RS-232C standard is used in:
Ans: Serial I/O - Memory Management in Operating Systems is done by:
(a) Memory Management Unit
(b) Memory management software of the Operating System (Ans)
(c) Kernel - What is done for a Push operation?
Ans: SP is decremented and then the value is stored. - Binary equivalent of 52:
Ans: 110100 - Hexadecimal equivalent of 3452:
Ans: 72A - Explain Just In Time Concept:
Ans: Elimination of waste by purchasing/manufacturing exactly when needed.