# Recent posts tagged gateoverflow

1
False : Consider $E: \{1,2,3,4\}$, $F:\{3,4,5,6\}$ $f(E) = \{5,6,7,8\}$ $f(F)=\{7,8,11,6\}$ $f(E \cap F) = \{7,8\}$ where as, $f(E) \cap f(F) = \{6,7,8\}$ Becomes TRUE only when $f$ ... $f(E \cap F) \subseteq f(E) \cap f(F)$ $\subseteq$ becomes $=$ only when $f$ is one-one - when the mappings are unique for each element.
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For answering there is no need to execute the query, we can directly answer this as $2$ How? Group by Student_Names It means all name that are same should be kept in one row. There are $3$ names. But in that there is a duplicate with Raj being repeated $\implies$ Raj produces ...
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Let $G$ be a weighted undirected graph and e be an edge with maximum weight in $G$. Suppose there is a minimum weight spanning tree in $G$ containing the edge $e$. Which of the following statements is always TRUE? There exists a cutset in $G$ having all edges of maximum ... in $G$ having all edges of maximum weight. Edge $e$ cannot be contained in a cycle. All edges in $G$ have the same weight.
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Choose the most appropriate word from the options given below to complete the following sentence: If we manage to __________ our natural resources, we would leave a better planet for our children. uphold restrain cherish conserve
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One of the header fields in an IP datagram is the Time-to-Live (TTL) field. Which of the following statements best explains the need for this field? It can be used to prioritize packets. It can be used to reduce delays. It can be used to optimize throughput. It can be used to prevent packet looping.
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The roots are $x=1, x=2$, and $x=3.$ So, polynomial is $f(x) = (x-1)(x-2)(x-3)$ $f(0) = -6, f(4) = 6$ So, $f(0)f(4) < 0$. Correct Answer: $A$
9
Let $T$ be a depth first search tree in an undirected graph $G$. Vertices $u$ and $ν$ are leaves of this tree $T$. The degrees of both $u$ and $ν$ in $G$ are at least $2$. which one of the following statements is true? There must exist a vertex $w$ adjacent to ... There must exist a cycle in $G$ containing $u$ and $ν$ There must exist a cycle in $G$ containing $u$ and all its neighbours in $G$
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Fetch_And_Add(X,i) is an atomic Read-Modify-Write instruction that reads the value of memory location $X$, increments it by the value $i$, and returns the old value of $X$ ... $L$ can take on a non-zero value when the lock is actually available works correctly but may starve some processes works correctly without starvation
11
Let $(A, *)$ be a semigroup, Furthermore, for every $a$ and $b$ in $A$, if $a \neq b$, then $a*b \neq b*a$. Show that for every $a$ in $A$, $a*a=a$ Show that for every $a$, $b$ in $A$, $a*b*a=a$ Show that for every $a,b,c$ in $A$, $a*b*c=a*c$
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