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SAMPLE PAPER–II

Class-XI Informatics Practices (065)

Time: 3 hours Max. Marks: 70
QUESTION 1

(a) What is the role of CPU in mobile system? (1)
Ans. A processor or CPU is the brain of a smartphone. It receives commands and makes instant calculations
and sends signals throughout your device (like human brain).
(b) Write the full form of MU and CPU in the context of COMPUTER system organization. (1)
Ans. MU – Memory Unit
CPU – Central Processing Unit
(c) Expand the terms ‘EB’ and ‘ZB’ in reference to memory unit. (1)
Ans. EB: Exa Byte, ZB: Zetta Byte
(d) Differentiate between Static and Dynamic RAM. (2)
Ans.
Dynamic RAM Static RAM
DRAM uses a separate capacitor to store each bit SRAM uses transistor to store a single bit of data.
of data.
DRAM needs periodic refreshment to maintain SRAM does not need periodic refreshment to
the charge in the capacitors for data. maintain data.
DRAM’s structure is simpler than SRAM. SRAM’s structure is more complex than DRAM.
DRAMs are less expensive as compared to SRAMs. SRAMs are more expensive as compared to DRAMs.
DRAMs are slower than SRAMs. SRAMs are faster than DRAMs.
DRAMs are used in main memory. SRAMs are used in cache memory.
(e) What is the difference between interpreter and compiler? (any two) (2)
Ans.
Interpreter Compiler
Translates one program statement at a time. Scans the entire program and translates it as a
whole into machine code.
It takes less amount of time to analyze the source It takes large amount of time to analyze the
code but the overall execution time is slower. source code but the overall execution time is
comparatively faster.
Continues translating the program until the It generates the error message only after
first error is met, in which case it stops. Hence, scanning the whole program. Hence, debugging is
debugging is easy. comparatively hard.
Programming languages like Python, Ruby use Programming languages like C, C++ use compilers.
interpreters.
(f) What is SoC? How is it different from CPU? Why is it considered a better development? (3)
Ans. SoC refers to system on a chip widely used in smartphones.
It is better than CPU because it consists of CPU, GPU, modem, multimedia processor, security device and
signal processor.
It offers better performance while power consumption is comparatively less.

QUESTION 2
(a) Who developed Python programming language? (1)
Ans. Guido van Rossum developed Python programming language in 1990.

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