Digital Electronics Objectives Part 16
301 . Micro-processors find application in pocket calculators, scientific instruments and medical equipment.
302 . Microprocessor were introduced in year 1971.
303 . In Von-Neumann-or-Princeton-type computer, the program can appear anywhere within the memory.
304 . Once the information is placed into a read only memory it can’t be modified easily.
305 . Flag bits in arithmetic unit provide status type information.
306 . The fetching, decoding and executing of an instruction is broken down into several time intervals, Each of these intervals, involving one or more clock periods, is called a machine cycle.
307 . In LIFO only the top of the stack is immediately accessible.
308 . The degree of nesting is dependent upon the storage capacity of the stack.
309 . Match the following:
Number system digit symbols
(a) Ternay (i) 0,1,3
(b) Quaternary (ii) 0,1,2,3,4,5,6,7,8,9,A,B
(c) Quinary (iii) 0,1,2,3,4
(d) Duodecimal (iv) 0,1,2
a—(iv), b—(i), c—(iii), d—(ii)
310 . Option C is correct
311 . Match the following
Laws of Boolean algebra Relation
(a) Distributive law (i) x + x = x
(b) Demorgans law (ii) x(y+z)=xy+xz
(c) Idempotent law (iii) (𝑥) = x
(d) Involution law (iv) (x+y) = 𝑥𝑦
a—(ii), b—(iv), c—(i), d—(iii)
(i) Distributive law (i) x + x = x
(ii) Demorgans law (ii) x(y+z)=xy+xz
(iii) Idempotent law (iii) (𝑥) = x
(iv) Involution law (iv) (x+y) = 𝑥𝑦
312 . Option D is correct
313 . 64 K is 65536
314 . 𝟐𝟏𝟐 bytes are there in 1111 1011 0111 0100 1010.
315 . Fig.56 shows an 8 bit LED display. A light circle means a LED is on (binary 1) and a dark circle means a LED is off (binary 0) 172 is the decimal equivalent of the binary display.
316 . A microcomputer has memory locations from 0000 to FFF, each storing 1 byte. 16,384 can be stored by memory.
317 . A microcomputer has a 64 K memory, 0000 is the hexadecimal notation for the first memory.
318 . In the above case the hexadecimal notation for the last memory location is FFFF.
319 . TTL is the most widely bipolar family.
320 . ECD is the fastest logic family used in high speed application.