Debugging xv6 using gdb Lab instructions. Continue from our previous lab, compile xv6. run make qemu-gdb. Then, in another window, run gdb from the xv6 directory, and then run che command source .gdbinit Now. in the gdb window run the following (shown in bold font) gdb) b exec gdb) c gdb) c Cgdb) c Answer the following question. 1. What does command "b" do? 2. What does command "c" do? 3. What do you see by executing the commends (b, c, c, c)? Why do you see that? REFERENCES It is possible to use GDB with xv6. To do this instead of running make qemu or make qemu- nox,run make qemu-gdb or make qemu-nox-gdb respectively. Then, in another window, run gdb from the xv6 directory, and then run the command source .gdbinit within GDB. Then, within GDB, you can set breakpoints

4. Find all instructors in Finance department who have taught some course in 2008. 5. Find all students from Physics department who took course 'CS-319'.

database multiple choice question pls

FIRST QUESTION :   An embassy records details of interviews of visa applicants in the table below. Interviews are        conducted by members of staff in some of the embassy rooms. In any given day, a member of        staff  tends to use the same room throughout that day. An applicant cannot have two interviews in        the same day :           R : applicantNo interviewDate interviewTime staffNo roomNo AP1 13.5.2016 10:30 S5 R101 AP2 13.5.2016 12:00 S5 R101 AP3 13.5.2016 12:00 S9 R200 AP2 22.9.2016 10:30 S5 R200      - List all possible candidate keys for the above relation :

Given 3-way BTree created by these data: 3, 7,9, 23, 45, 1, 5, 14, 25, 24, 13, 11 1. Draw the final BTree. 2. Draw the final BTree after adding these further keys (from your answer in #1) 2, 6,12 3. Draw the final BTree after deleting these keys using successor (from your answer in #2) 5, 7, 23

Question 35 If there are several operators with same priority in an arithmetic expression of an SQL statement then the priority will be For division for multiplication From left to right For addition

Is the following table in First Normal Form? If so, how would you get it into first normal form.         SalesPerson/Product table         Order Number Product  Number Salesperson ID SalesPerson Name Commission Percentage Year of Hire Department Number Department                 Name Product Name Unit Price Quantity 137 19440 15 Baker 10 1995 73 Commercial Sales Hammer 17.50 473   24013             Saw 26.25 170   26722             Pliers 11.50 688 186 16386 7 Adams 15 2001 59 Home Sales Wrench 12.95 1745   19440             Hammer 17.50 2529

write Sql statements to write query for the given table .. the query statements are. Display first name of doctors whose first name contains any of vowels (a,e,i,o,u). Display names of those patients whose name’s second letter is neither ‘a’ nor ‘d’ Display details of those patients whose name contains less than 5 characters. Display first 4 doctors who are earning least salary. Display details of all patients in such a way that female patients are shown before male patients. Display names of those patients whose names starts with either ‘a’ or ‘b’ or‘d’ and don’t ends on‘s’. Display 1/4 records of patients.

Please explain what "Set Cell values do not converge" means in this context.

Determine how long it takes for data to arrive.